When John and Tom escape, Angela is waiting for them in a blue station wagon. When they arrive at the ranch, the station wagon is white.
Angela's eyeglasses and clothing are more reminiscent of the 1980s than in the movie's setting of 1974.
The Chevrolet K-5 Blazer that Sheriff Will is driving has a removable half-roof and full-framed doors, which were on Blazer models manufactured 1977 and later. The movie is set in 1974, when Blazers would have had removable full roofs and doors not fully framed around the windows from 1973 to 1976.